--- /dev/null
+<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.1.6 or newer
+ *
+ * @package CodeIgniter
+ * @author ExpressionEngine Dev Team
+ * @copyright Copyright (c) 2008 - 2011, EllisLab, Inc.
+ * @license http://codeigniter.com/user_guide/license.html
+ * @link http://codeigniter.com
+ * @since Version 1.0
+ * @filesource
+ */
+
+// ------------------------------------------------------------------------
+
+/**
+ * Router Class
+ *
+ * Parses URIs and determines routing
+ *
+ * @package CodeIgniter
+ * @subpackage Libraries
+ * @author ExpressionEngine Dev Team
+ * @category Libraries
+ * @link http://codeigniter.com/user_guide/general/routing.html
+ */
+class CI_Router {
+
+ var $config;
+ var $routes = array();
+ var $error_routes = array();
+ var $class = '';
+ var $method = 'index';
+ var $directory = '';
+ var $default_controller;
+
+ /**
+ * Constructor
+ *
+ * Runs the route mapping function.
+ */
+ function __construct()
+ {
+ $this->config =& load_class('Config', 'core');
+ $this->uri =& load_class('URI', 'core');
+ log_message('debug', "Router Class Initialized");
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set the route mapping
+ *
+ * This function determines what should be served based on the URI request,
+ * as well as any "routes" that have been set in the routing config file.
+ *
+ * @access private
+ * @return void
+ */
+ function _set_routing()
+ {
+ // Are query strings enabled in the config file? Normally CI doesn't utilize query strings
+ // since URI segments are more search-engine friendly, but they can optionally be used.
+ // If this feature is enabled, we will gather the directory/class/method a little differently
+ $segments = array();
+ if ($this->config->item('enable_query_strings') === TRUE AND isset($_GET[$this->config->item('controller_trigger')]))
+ {
+ if (isset($_GET[$this->config->item('directory_trigger')]))
+ {
+ $this->set_directory(trim($this->uri->_filter_uri($_GET[$this->config->item('directory_trigger')])));
+ $segments[] = $this->fetch_directory();
+ }
+
+ if (isset($_GET[$this->config->item('controller_trigger')]))
+ {
+ $this->set_class(trim($this->uri->_filter_uri($_GET[$this->config->item('controller_trigger')])));
+ $segments[] = $this->fetch_class();
+ }
+
+ if (isset($_GET[$this->config->item('function_trigger')]))
+ {
+ $this->set_method(trim($this->uri->_filter_uri($_GET[$this->config->item('function_trigger')])));
+ $segments[] = $this->fetch_method();
+ }
+ }
+
+ // Load the routes.php file.
+ if (defined('ENVIRONMENT') AND is_file(APPPATH.'config/'.ENVIRONMENT.'/routes'.EXT))
+ {
+ include(APPPATH.'config/'.ENVIRONMENT.'/routes'.EXT);
+ }
+ elseif (is_file(APPPATH.'config/routes'.EXT))
+ {
+ include(APPPATH.'config/routes'.EXT);
+ }
+
+ $this->routes = ( ! isset($route) OR ! is_array($route)) ? array() : $route;
+ unset($route);
+
+ // Set the default controller so we can display it in the event
+ // the URI doesn't correlated to a valid controller.
+ $this->default_controller = ( ! isset($this->routes['default_controller']) OR $this->routes['default_controller'] == '') ? FALSE : strtolower($this->routes['default_controller']);
+
+ // Were there any query string segments? If so, we'll validate them and bail out since we're done.
+ if (count($segments) > 0)
+ {
+ return $this->_validate_request($segments);
+ }
+
+ // Fetch the complete URI string
+ $this->uri->_fetch_uri_string();
+
+ // Is there a URI string? If not, the default controller specified in the "routes" file will be shown.
+ if ($this->uri->uri_string == '')
+ {
+ return $this->_set_default_controller();
+ }
+
+ // Do we need to remove the URL suffix?
+ $this->uri->_remove_url_suffix();
+
+ // Compile the segments into an array
+ $this->uri->_explode_segments();
+
+ // Parse any custom routing that may exist
+ $this->_parse_routes();
+
+ // Re-index the segment array so that it starts with 1 rather than 0
+ $this->uri->_reindex_segments();
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set the default controller
+ *
+ * @access private
+ * @return void
+ */
+ function _set_default_controller()
+ {
+ if ($this->default_controller === FALSE)
+ {
+ show_error("Unable to determine what should be displayed. A default route has not been specified in the routing file.");
+ }
+ // Is the method being specified?
+ if (strpos($this->default_controller, '/') !== FALSE)
+ {
+ $x = explode('/', $this->default_controller);
+
+ $this->set_class($x[0]);
+ $this->set_method($x[1]);
+ $this->_set_request($x);
+ }
+ else
+ {
+ $this->set_class($this->default_controller);
+ $this->set_method('index');
+ $this->_set_request(array($this->default_controller, 'index'));
+ }
+
+ // re-index the routed segments array so it starts with 1 rather than 0
+ $this->uri->_reindex_segments();
+
+ log_message('debug', "No URI present. Default controller set.");
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set the Route
+ *
+ * This function takes an array of URI segments as
+ * input, and sets the current class/method
+ *
+ * @access private
+ * @param array
+ * @param bool
+ * @return void
+ */
+ function _set_request($segments = array())
+ {
+ $segments = $this->_validate_request($segments);
+
+ if (count($segments) == 0)
+ {
+ return $this->_set_default_controller();
+ }
+
+ $this->set_class($segments[0]);
+
+ if (isset($segments[1]))
+ {
+ // A standard method request
+ $this->set_method($segments[1]);
+ }
+ else
+ {
+ // This lets the "routed" segment array identify that the default
+ // index method is being used.
+ $segments[1] = 'index';
+ }
+
+ // Update our "routed" segment array to contain the segments.
+ // Note: If there is no custom routing, this array will be
+ // identical to $this->uri->segments
+ $this->uri->rsegments = $segments;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Validates the supplied segments. Attempts to determine the path to
+ * the controller.
+ *
+ * @access private
+ * @param array
+ * @return array
+ */
+ function _validate_request($segments)
+ {
+ if (count($segments) == 0)
+ {
+ return $segments;
+ }
+
+ // Does the requested controller exist in the root folder?
+ if (file_exists(APPPATH.'controllers/'.$segments[0].EXT))
+ {
+ return $segments;
+ }
+
+ // Is the controller in a sub-folder?
+ if (is_dir(APPPATH.'controllers/'.$segments[0]))
+ {
+ // Set the directory and remove it from the segment array
+ $this->set_directory($segments[0]);
+ $segments = array_slice($segments, 1);
+
+ if (count($segments) > 0)
+ {
+ // Does the requested controller exist in the sub-folder?
+ if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$segments[0].EXT))
+ {
+ show_404($this->fetch_directory().$segments[0]);
+ }
+ }
+ else
+ {
+ // Is the method being specified in the route?
+ if (strpos($this->default_controller, '/') !== FALSE)
+ {
+ $x = explode('/', $this->default_controller);
+
+ $this->set_class($x[0]);
+ $this->set_method($x[1]);
+ }
+ else
+ {
+ $this->set_class($this->default_controller);
+ $this->set_method('index');
+ }
+
+ // Does the default controller exist in the sub-folder?
+ if ( ! file_exists(APPPATH.'controllers/'.$this->fetch_directory().$this->default_controller.EXT))
+ {
+ $this->directory = '';
+ return array();
+ }
+
+ }
+
+ return $segments;
+ }
+
+
+ // If we've gotten this far it means that the URI does not correlate to a valid
+ // controller class. We will now see if there is an override
+ if ( ! empty($this->routes['404_override']))
+ {
+ $x = explode('/', $this->routes['404_override']);
+
+ $this->set_class($x[0]);
+ $this->set_method(isset($x[1]) ? $x[1] : 'index');
+
+ return $x;
+ }
+
+
+ // Nothing else to do at this point but show a 404
+ show_404($segments[0]);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Parse Routes
+ *
+ * This function matches any routes that may exist in
+ * the config/routes.php file against the URI to
+ * determine if the class/method need to be remapped.
+ *
+ * @access private
+ * @return void
+ */
+ function _parse_routes()
+ {
+ // Turn the segment array into a URI string
+ $uri = implode('/', $this->uri->segments);
+
+ // Is there a literal match? If so we're done
+ if (isset($this->routes[$uri]))
+ {
+ return $this->_set_request(explode('/', $this->routes[$uri]));
+ }
+
+ // Loop through the route array looking for wild-cards
+ foreach ($this->routes as $key => $val)
+ {
+ // Convert wild-cards to RegEx
+ $key = str_replace(':any', '.+', str_replace(':num', '[0-9]+', $key));
+
+ // Does the RegEx match?
+ if (preg_match('#^'.$key.'$#', $uri))
+ {
+ // Do we have a back-reference?
+ if (strpos($val, '$') !== FALSE AND strpos($key, '(') !== FALSE)
+ {
+ $val = preg_replace('#^'.$key.'$#', $val, $uri);
+ }
+
+ return $this->_set_request(explode('/', $val));
+ }
+ }
+
+ // If we got this far it means we didn't encounter a
+ // matching route so we'll set the site default route
+ $this->_set_request($this->uri->segments);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set the class name
+ *
+ * @access public
+ * @param string
+ * @return void
+ */
+ function set_class($class)
+ {
+ $this->class = str_replace(array('/', '.'), '', $class);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Fetch the current class
+ *
+ * @access public
+ * @return string
+ */
+ function fetch_class()
+ {
+ return $this->class;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set the method name
+ *
+ * @access public
+ * @param string
+ * @return void
+ */
+ function set_method($method)
+ {
+ $this->method = $method;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Fetch the current method
+ *
+ * @access public
+ * @return string
+ */
+ function fetch_method()
+ {
+ if ($this->method == $this->fetch_class())
+ {
+ return 'index';
+ }
+
+ return $this->method;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set the directory name
+ *
+ * @access public
+ * @param string
+ * @return void
+ */
+ function set_directory($dir)
+ {
+ $this->directory = str_replace(array('/', '.'), '', $dir).'/';
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Fetch the sub-directory (if any) that contains the requested controller class
+ *
+ * @access public
+ * @return string
+ */
+ function fetch_directory()
+ {
+ return $this->directory;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Set the controller overrides
+ *
+ * @access public
+ * @param array
+ * @return null
+ */
+ function _set_overrides($routing)
+ {
+ if ( ! is_array($routing))
+ {
+ return;
+ }
+
+ if (isset($routing['directory']))
+ {
+ $this->set_directory($routing['directory']);
+ }
+
+ if (isset($routing['controller']) AND $routing['controller'] != '')
+ {
+ $this->set_class($routing['controller']);
+ }
+
+ if (isset($routing['function']))
+ {
+ $routing['function'] = ($routing['function'] == '') ? 'index' : $routing['function'];
+ $this->set_method($routing['function']);
+ }
+ }
+
+
+}
+// END Router Class
+
+/* End of file Router.php */
+/* Location: ./system/core/Router.php */
\ No newline at end of file
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